Stopping-gear for sewing-machines.



PATENTED MAY- 26, 1908.

J. BEATTIB. STOPPING GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1905.

3 SHEETSSHEET 1.

N VE N TOR J'i/VIESBEATT/ ATTORNEYS PATENTBD MAY 26, 1908.

J. BEATTIE.

STOPPING GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1906.

3 SHEETS-SHEET 2.

F l C 10 iailllim INVENTOR w ITNESSES a. 98 8 m @886 PATENTED MAY 26,1908.

J. BEATTIE.

STOPPING, GEAR FOR SEWING MACHINES.

APPLICATION FILED JULY 10, 1905.

3 SHEETS-SHEET 3.

- IVNVENTOR UNITED STATES PATENT oFFIoE.

JAMES BEATTIE, OF PENDLETON, NEAR MANCHESTER, ENGLAND.

' Specification of LettersjPatent.

STOPPING-GEAR FOR SEWING-MACHINES.

Patented May 26, 1908.

Application filed. July 10, 1905. Serial No; 269,069.

To, all whom it may concern:

- Bedt known that I, JAMEs BEATTI E, a sub- 7 ject of the King of GreatBritain and Ireland,

- material sewn.

and residing at Swan street, Pendleton, near Manchester, in the countyofLancaster, England, have invented new anduseful Improvements inStopping-Gear for Sewing-Machines,

In the accompanying drawings, Figure 1 is 7 a front elevation showingthe bobbin or a spool with a spring lever device, for making an electriccontact on a sewing machine, also thread guides, and feed mechanism forthe bobbin; Fig. 2 is an end elevation of the small spring lever shownin Fig. 1 for making theelectric contact; Fig. 3 is aside view, and Fig.4 an end view of small electric motor with cam attachment and fallinglever; Fig. 5 is a front view, Fig. 6 a side view, and 'Fi 7 a plan viewof the bracket carrying the e co.- tric motor and strap fork displacinggear; Fig. 8 is a front view, Fig. 9 an end view, and Fig. 10 anopposite end view of a sewing machine with the parts hereinbeforementioned applied thereto.

Referring to Figs. 1 and 2, a bracket 9 is provided to carry the threadrides f and springlever d of resilient material, also bobbin disk andpulley a, and contact rod e. One end of the rod e is connected to anelectric wire at the point e, the other end of the wire being connectedto a small electric motor as'i, Figs. 3 and 8. The bracket 9 may besecured to the overhanging arm of the sewing machine or on the machinetable, as

desired.

The operation is as follows :The machine is threaded up by fixing thetop bobbin a onthe other end 0 the wire is connected 'to a battery B,Fig.' 8, or other source of electric current; the thread is then carriedto the tension and thence to the take up lever and needle of the sewingmachine. The top thread is made to feed up to the material being sewn,independent of the action of the ordinary'feed, but at a slower. rate ofspeed,

or substantially equal thereto'by the I'OtBr' tion of the bobbin diskand pulley a;

What is termed the ordinary feed is the manner in which the thread ispulled from the bobbin as the machine is sewing. The function of theextra independentfeed is to cause the contact member to make thecon tactwhen the top thread breaks or is cut by the knife in the presser foot.The top thread v always breaks at some point between the needle andtension 9, so that ordinarily the thread would not slacken between thetension and the bobbin, thereby permitting a contact to be made betweenthe rod 6 and .lever d. This difficulty is avoided by' putting the extraor independent feed upon the top thread, in the mannerdescribed, therebycausing the thread to slacken an'dthe spring member (1 to contact withthe rod 6 when the top thread breaks. This'independent feed is arrangedso as never to overtake the ordinary feed of the sewing machine, but tobe substantially e ual thereto. The top bobbin may be driven" y afriction driven cord; or

any suitable feed gear,'as desired, for instance, such-as shown, which Iwill 'now describe. The bobbin a is driven by a worm g and-wheel'g, Fig.9. The worm is preferably located at the end of the inain sewing machineshaft- The worm wheel 9 is mounted upon a vertical spindle, whichcarries three or more small ra'duated grooved pulleys 9 one of which isgeared with the obbin pulley-g Fig. 8, by means of an end less cord. Ido not wish to confine myself i to 'usin this articular form of gearingto effect t e feed of'the-top thread, for obviously any suitable formmay be used so that when the top threadbreaks, at any point betweentheneedle and the tension, the independent feed causes the top thread toslacken between the tension and bobbin, allowing the small spring leverto spring back to the position indicated by dotted lines in Fig. 2, andcontact with the rod 2 carried in insulated bearings 'e Upon the shaftt' is mounted a cam i Fig. 5, and, therefore, when the sprin lever '11comes into contact with the rod 6 t e circuit volves harmlessly, butwhen it falls to the horizontal position, as shown in dotted lines, itfalls between the rotating cam it and the strap fork lever Z, forcingthe latter out ofits retaining notch Fig. 7. The electric motor andstrap fork displacing gear may be mounted upon a standard bracket 3'under the sewing machine table and supported therefrom or from thefloor. A lug is formed in the bracket j, fig. 5, to which the strap forklever lis pivoted at 9'. Therefore, when the lever Zis forced out of itsretaining notch,

- tion, the strap fork lever I move the s ring 3' fig. 5, one end ofwhich is secure to the lever l and the other to the 1 bracket ulls itover to the position shown in dotted nes, shifting the strap onto theloose pulley m, thereby stopping the machine.

To start the machine the thread is carried through the guides f, lig. 1,and tension 9, and then Ipulled tight, thereby breaking the contact, t elever i lifted to its u right posig back into the retaining notch 1 Fig.5, moving the strapljon the rotating pulley m, whereby the mac neisstarted.

What I claim and desire to secure by Letters Patent is 1. In combinationwith a sewing machine, having a needle, and operating means, means forstopping the operating means when the bobbin thread breaks, comprising aspring contact member, an electric circuit, a motor therein having amotor shaft, an'electric contact point located between the needle andthe upper bobbin for completin the circuit with the spring contact memer on the breaking of a thread, whereby the motor is started, a cam onthe motor shaft, a lever actuated by said cam, and means for throwingthe operating means of the machine out of gear on the actuating of saidlever.

2. In a sewing machine having a tension, a needle and operating means,means for stopping the machine when a thread breaks or gives out,comprising an electric circuit, and a contact between said tension andthe thread supply, a motor started on completing the circuit throughsaid contact, and means operated by the motor for throwing the operatingmeans out of gear, in combination with a feed mechanism for feeding thethread to cause a slack betweensaid tension and the thread supply. I

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

JAMES BEATTIE.

Witnesses:

JNo. HUGHES, J. ERNEST HUGHEs.

